Revert 230841 "Switch DropData's path field from a string16 to a..."
> Switch DropData's path field from a string16 to a FilePath.
> 
> Review URL: https://codereview.chromium.org/38933002

Cannot link content_shell.exe due to unresolved symbol for
content::DropData::FileInfo::FileInfo(....)

TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/42283002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230859 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230859